Long commands are to be given only in command mode, 0x29 and 0x39 are the valid data types.
°Check for ready for long packet bit to be 1 (Bit 7 in 0x2C register).
°Write datatype and word count (WC) fields in 0x30 Data FIFO register. Word count is written to bits (15:8) of 0x30.
°Write 4 bytes at a time of payload data to 0x34 Data FIFO register.
-For example, if you have 3 bytes as WC. Write 0x00P3P2P1 to the 0x34 Data FIFO register. Append the extra MSB bits with 0s.
-Similarly, if you have 6 bytes of valid data program WC as 6, then write 0xP4P3P2P1 to 0x34 register. Next write 0x0000P6P5 to the same 0x34 Data FIFO register